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Plane-Table Alidade, by George Adams, London, Late 18th Century

Inventory Number 41452

Item type
Object
Provenance
Presented by Lord Dillon.
Primary inscriptions
"G. Adams LONDON"
Other inscriptions
Written on reverse (by R.T. Gunther) "Pres. by Lord DILLON / 1931"
Physical material
Copper Alloy
Object type
Alidade
Dimensions
Height: 501mm Width: 49mm
Inventory No
41452
Accession Number
1931-12

Description

Diagonal scale of inches and half-inches, and a plain scale dividing inches into 10, 15, 20, 25, 30 parts, with a scale of chords. The sights are alternating slit and thread. Each sight is fixed on by an oval-headed screw.

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